Difficult to say really. I went for the Stomp for the size more than anything else. I’d have loved the FX as I dont need the amp sims, but it’s much larger than i care for. I like that I have the amp sims if needed but do miss having more footswitches.
Personally I don't think you are missing out on anything at the moment, assuming you can make use of more than 3 foot switches, and there is enough in the FX to still allow you to go direct to the desk. Like you say, you still have preamps like the BDDI, which were designed for this sort of thing anyway.